Lava lake in Halema‘uma‘u, Kīlauea summit—December 10, 2021

View of the active western half of the lava lake in Halema‘uma‘u at the Kīlauea summit. The main island that serves as a boundary between the active (west) and inactive (east) parts of the lake is the brown area in the middle right side of this photo. In this view looking northwest, the western fissure cone is visible in the middle left, with a prominent perched lava pond at its top. Lava enters the lava lake at the base of the western fissure cone. Small localized crustal foundering, some with low level spattering, is visible as red hot patches around the lake surface. USGS photo by N. Deligne.